<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello</title>
</head>
<body>
    <form action="{:U('Users/update')}" method="POST" enctype="multipart/form-data">
        <input name="img" type="file" >
        <input name="user[username]" type="text" >
        <input name="user[password]" type="text" >
        <input name="user[id]" type="hidden" value="12" >
        <input type="submit" value="Button">
    </form>
</body>
</html>
